Burglar-alarm.



- Patented Nov 26, MIL

I. T. annulus.

BURGLAR ALARM, (Application filed Aug. 15, 1 901.)

(No Model.).

UNITED STATES PATENT- @F ICE.

ISAAC T. GOODING, OF GRAFTON, WEST VIRGINIA.

.BURGLAR-ALARM.

SPECIFICATION forming part of LettersPatent No. 687,303, dated November 26,

Application flied August 15,1901. Serial No. 72,170. lNo model.)-

T0 at whom it may concern.- 4

Be it known that I, ISAAC T. GOODING, a citizen of the United States, residin g at Grafton, in the county of Taylor and State of West Virginia, have invented a new and useful Burglar-Alarm, of which the following is a specification.

The invention relates to improvements in burglar-alarms.

The object of the present'invent-ion is to improve the construction of burglar-alarms and to provide a simple, inexpensive, and efficient one adapted to be readily applied to a window and capable'of ringing'a bell should either of the sashes of a window be moved, whereby the occupants of a house or other building will be warned of an attempt to effect an entrance through the window.

A further object of the invention is to provide a device of this character which may be connected with'the sashes when it is desired to arrange the device for operation and which may be easily disconnected from them when it is desired to prevent the device from operating.

The invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appended.

1n the drawings, Figure 1 is a perspective View of a burglar-alarm constructed in accordance with this invention and shown applied to a window. Fig. 2 is a transverse sec]- tional view. Fig. 3 is an elevation, the bell being moved to illustrate the construction of the bell-engaging plungers. Fig. 4 is a Vertical sectional view of the combined cam and tappet-Wheel. Fig. 5 is a similar view showing the opposite side of the combined cam and tappet-wheel. 7

Like numerals of reference designate corresponding parts in all the figures of the drawings. Y

1 designates an approximately cylindrical casing provided with upper and lowerextensions or ears 2, having perforations for the reception of screws or other suitable fastening devices for securing the casing to a win dow-frame 3, as clearly illustrated in Fig. 1 of the accompanying drawings. The casing is provided with an outer flaredportion 4,

and it has a coverjorplate 5, consisting of a disk' and forming a support for the bell-engaging mechanism. The plate 5,which forms the outerend or front of the casing, is provided with a central bearing-opening for the reception of a shaft 6, which has its other end journaled in a central bearing-opening of the back of the casing, and the ends of the shaft are preferably reduced, as shown, to form journals or bearing portions. The shaft carries a drum 7, and it is connected with the inner end of a barrel-spring 8, which has its outer end secured to the casing, as clearly illustrated in Fig. 2, and which is adapted to return the shaft to its initial position and rewind a ribbon 9 after the device has been operated, as hereinafter explained. The ribbon, which is preferably constructed of steel, may be of any other desired construction, and it is secured at its inner end to the drum and is wound thereon, whereby when the ribbon is drawn outward the shaft will be rotated. The drum may be of any'desired construction, and it is provided with parallel flanges or heads, between which the ribbon is arranged when it is wound up on the drum.

' The ribbon extends outward through a slot or opening lO'of the casing 1 to the upper sash 11, and it passes over a pulley 13 of a casing 14, which is, mounted on the lower sash 15. The casing is preferablycomposed of a base or bottom piece, segmental sides, and a connecting top piece, the ribbon passing between the roller and the top piece, as clearly showninFig.1. The outerterminaloftherib- ,bon is secured to a transverse pin or piece 16,

having its. terminals bent at right angles to form a pair of arms and adapted toengage a pair of hooks 17 of a plate 18. The plate 18,

which is secured to the'upper sash, has its lower end slotted or bifurcated and the sides are bent upward to form the hooks, and these engagement with the hooks by'a pivoted locking-plate 18*, located above the hooks and provided with a perforation for the reoeption of the fastening device 19, which is adapted to secure the plate to the sash and pivot the locking-plate to permit the same to swing into and out of its engaging position. The locking-plate is held in its engaging position both by gravity and by friction, the screw 19 being adapted to be tightened to secure the necessary frictional engagement between the locking-plate and the said plate 18. The lower end of the locking-plate is provided with a projection 20, located directly above the ribbon and adapted to be readily grasped when it is desired to swing the locking-plate away from the hooks to release the ribbon. The outer end of the ribbon and the pin are adapted to be readily passed through the casing 14, and when the ribbon is connected with the upper sash and is arranged as shown in Fig. 1 the top of the casing prevents the ribbon from leaving the roller.

The drum is connected by a clutch with a combined cam and tappet-wheel 21, and the said clutch consists of a ratchet-wheel 22, preferably formed integral with the wheel 21 and engaged by a spring-actuated pawl 23. The pawl 23 is pivoted to the adjacent side or head of the drum and is held in engagement With the ratchet-wheel by a spring 24, having one end secured in a kerf of the pawl and its other end engaging a pin or projection 25 of the drum; but the spring may be arranged in any other suitable manner. When the ribbon is drawn outward and the shaft is rotated forwardly, the clutch causes a corresponding forward rotation of the combined cam and wheel; but when the spring rewinds the ribbon the pawl moves over the ratchet-teeth without engaging the same. This backward movement of the shaft incident to the rewinding of the ribbon on the drum does not rotate the combined cam and tappet-wheel.

The combined cam and tappet-wheel 21 is loosely mounted on the shaft 6 and it is provided with a series of tapering or wedgeshaped teeth 26 and it has an annular series of tappets 27. The teeth form cams for engaging an arm 28 of a spring-actuated plunger 29, mounted in a suitable guide 30 and provided with a head 31. The head 31, which is preferably arranged at the upper end of the plunger, is adapted to engage a bell 32, and the arm 28, which is located at the lower end of the plunger, extends through a slot or opening of the outer end of the casing and' projects into the path of the cams or teeth. The plunger is preferably arranged vertically, as shown, although it may be disposed in any other position, and the spring 29, which actuates the plunger 29, may be arranged in any suitable manner. The cams or teeth move the plunger in one direction and the spring throws it in the opposite di rection against the bell 32. The bell 32 is mounted on a stem 33, extending centrally from the outer end of the casing.

The annular series of tappets is arranged to engage an arm 34, arranged at one end of the spring-actuated rock-shaft 35, which is provided at its other end with an arm 36.

The arm 36, which is connected with a spiral spring 37, is also connected with a plunger 38, mounted in a suitable guide and provided at its outer end with a head 39 for engaging the bell. The plunger 38 passes loosely through an eye or opening of the guide 40, and it is arranged at right angles to the plunger 29. When the ribbon is drawn outward, the plungers are rapidly reciprocated and the bell is rung to indicate to the inmates of a house or other building that an attempt is made to enter a window. The rock-shaft 35 is journaled in suitable bearings, and the arm 34 extends through an opening or aperture of the outer end of the casing. The bell 32 c0nceals the plungers which constitute the bell engaging mechanism, and the said bell is adapted to be readily removed to afford access to the interior of the device.

It will be seen that the burglar-alarm is exceedingly simple and inexpensive in construction, that it is readily adapted to be applied to a window, and that after it has been connected with the sashes the bell will be rung should the lower sash be raised or the upper sash be lowered.

What I claim is 1. A device of the class described comprising a bell, a reciprocating spring actuated plunger arranged to engage the bell, a rock= shaft provided at its ends with arms, one arm being connected with the plunger, and means for vibrating the other arm of the rock-shaft, substantially as and for the purpose described.

2. A device of the class described compris ing a bell, a reciprocating spring-actuated plunger arranged to engage the bell, a rockshaft provided at its ends with arms, one arm being connected with the plunger, a wheel provided with a series of tappets arranged to engage the other arm of the r0ck-shaft, and means for rotating the wheel, substantially as described.

3. A device of the class described comprising a shaft, a ribbon connected with the shaft, a bell, bell-ringing mechanism operated by the shaft, a plate 18 provided at opposite sides with hooks, a pin carried by the ribbon and engaging the hooks, and a pivoted plate mounted on the said plate and arranged to hold the pin in engagement with the hooks, substantially as described.

4. A device of the class described comprising a bell, the reciprocating plunger 29 arranged to engage the bell, the plunger 38 arranged at an angle to the plunger 29, the rock-shaft 35 provided at its ends with arms 34 and 36, the arm 36 being connected with the plunger 38, and the combined cam and tappet-wheel provided with a series of cams for engaging the plunger 29 and having tappets arranged to engage the arm 3% of the rock-shaft 35, substantially as described.

5. Adeviee of the class described comprising a bell, a shaft, belhringing mechanism operated by the shaft, the casing 14 designed esmoe g to be mounted on the top of the lower sash In testimony that I claim the foregoing as and provided with a pulley, a clamping demy own I have hereto affixed my signaturein I0 vice adapted to be mounted on the upper the presence of two witnesses.

sash, and a ribbon connected with the shaft and passing through the casing and engaged ISAAC GOODING' by the said clamping device, whereby it is Witnesses:

detachably secured to the upper sash, sub- T. BLAIR SHOEMAKER,

stantially as described. W. J. DILLON. 

